Soft enough not to hurt your dog’s teeth, but firm enough to bounce. The bounciest tennis ball under the sun!
| Molecule | Size | |
| Gluon | SMALL | 50mm | 2″ |
| Electron | MEDIUM | 65mm | 2.5″ |
| Proton | LARGE | 80mm | 3″ |
Soft enough not to hurt your dog’s teeth, but firm enough to bounce. The bounciest tennis ball under the sun!
| Molecule | Size | |
| Gluon | SMALL | 50mm | 2″ |
| Electron | MEDIUM | 65mm | 2.5″ |
| Proton | LARGE | 80mm | 3″ |