The rainbow roller - for kids and their parents

I rather like the concept of a toy that parents can get a benefit from. I don't just mean something like model train layouts (where adults often take over because it's so much fun) - no, I mean items that actually do double service.

Meet the Rainbow roller - by day, it's a wooden car for your toddler to roll around the floor. By night, it's a muscle massager - and you'll need it after a day spent on hands and knees playing cars, won't you? If only all toys had a built-in de-stressing function, life would be so much easier.