Foam product

1. A foam product comprising:

a foam core defining in its top surface a recess, the recess having an inner wall; and

a soft shell disposed within the recess of the foam core and having an outer wall attached to the inner wall of the recess, wherein the soft shell has a space and an opening that communicate with each other, the space surrounded by an inner wall of the soft shell, the opening exposed on the top surface of the foam core, wherein the inner wall of the soft shell has a front surface, a rear surface, a left surface and a right surface, and a distance from the front surface to the rear surface is greater than a distance from the left surface to the right surface, wherein the space of the soft shell has a depth greater than a distal finger of a human hand.

2. The foam product as recited in claim 1 , wherein the soft shell is made of an irradiated cross-linked polyethylene foam with a thickness of 2 mm to 3 mm.

3. The foam product as recited in claim 1 , wherein the space of the soft shell is configured in size to receive at least one finger.

4. The foam product as recited in claim 3 , wherein the space of the soft shell has an upper space and a lower, enlarged space to permit bending of the finger.

5. The foam product as recited in claim 3 , wherein the soft shell includes a shell body and a pair of extensions extending from opposite sides of the shell body, each of the extensions has two sheets attached to each other, and the recess of the foam core is sized and shaped to receive the soft shell.

6. The foam product as recited in claim 3 , wherein the foam core includes a first foam body and a second foam body disposed in the first foam body; the second foam body is more rigid than the first foam body; and the recess is defined in the second foam body of the foam core.

7. The foam product as recited in claim 6 , wherein the first foam body of the foam core comprises expanded polystyrene, and the second foam body of the foam core comprises a copolymer of expanded polystyrene and expanded polyethylene.

8. The foam product as recited in claim 3 , further comprising an upper foam skin with a bottom surface bonded to the top surface of the foam core, wherein the upper foam skin defines a first hole aligned with an opening of the space of the soft shell.

9. The foam product as recited in claim 8 , further comprising a non-foam plastic film with a bottom surface bonded to the top surface of the upper foam skin, wherein the non-foam plastic film defines a second hole aligned with the first hole of the upper foam skin.

10. The foam product as recited in claim 8 , further comprising a lower foam skin with a top surface bonded to a bottom surface of the foam core, and a non-foam plastic plate with a top surface bonded to a bottom surface of the lower foam skin.

11. A foam product comprising:

a foam core defining in its top surface a recess, the recess having an inner wall; and

a soft shell disposed within the recess of the foam core and having an outer wall attached to the inner wall of the recess, wherein the soft shell includes a shell body and a pair of extensions extending from opposite sides of the shell body, each of the extensions has two sheets attached to each other, and the recess of the foam core is sized and shaped to receive the soft shell.

12. The foam product as recited in claim 11 , wherein the foam core includes a first foam body and a second foam body disposed in the first foam body; the second foam body is more rigid than the first foam body; and the recess is defined in the second foam body of the foam core.

13. The foam product as recited in claim 12 , wherein the first foam body of the foam core comprises expanded polystyrene, and the second foam body of the foam core comprises a copolymer of expanded polystyrene and expanded polyethylene.

14. The foam product as recited in claim 11 , further comprising an upper foam skin with a bottom surface bonded to the top surface of the foam core, wherein the upper foam skin defines a first hole aligned with an opening of the space of the soft shell.

15. The foam product as recited in claim 14 , further comprising a non-foam plastic film with a bottom surface bonded to the top surface of the upper foam skin, wherein the non-foam plastic film defines a second hole aligned with the first hole of the upper foam skin.

16. The foam product as recited in claim 14 , further comprising a lower foam skin with a top surface bonded to a bottom surface of the foam core, and a non-foam plastic plate with a top surface bonded to a bottom surface of the lower foam skin.

17. A foam product comprising:

a foam core having a top surface, a bottom surface and a periphery surrounding the top surface and the bottom surface, wherein the periphery has a top edge adjacent to the top surface, an upper area adjacent to the top edge, a bottom edge adjacent to the bottom surface and an lower area adjacent to the bottom edge;

an upper foam skin with a bottom surface fully covered and bonded to the top surface of the foam core and the upper area of the periphery of the foam core; and

a lower foam skin with a top surface fully covered and bonded to the bottom surface of the foam core and the lower area of the periphery of the foam core, wherein a peripheral edge of the lower foam skin is connected to a peripheral edge of the upper foam skin so that a foam shell that encloses the foam core is formed;

wherein the foam core has a tightly packed cluster of expanded beads, wherein some outermost beads of the expanded beads are exposed and protruded on the top surface, the bottom surface and the periphery of the foam core, and the foam shell has a plurality of cavities at its entire inner surface sized and shaped to respectively receive the protruded, outermost beads on the top surface, bottom surface and the periphery of the foam core.

18. The foam product as recited in claim 17 , further comprising two non-foam plastic films fully covered and bonded to the top surface of the upper foam skin and the bottom surface of the lower foam skin respectively.