Professor Pengelly's Putty

This putty will bounce, pop, sculpt, snap, stretch, and squeeze, which is excellent for finger and hand strengthening. This putty is totally moldable and malleable, won't dry out in the tin, and provides scientific stress relief. Some putty changes colors with heat, some can be drawn on with a UV light, some glows in the dark, some are magnetic, some sparkle and shine--there's an endless variety!