You may have teams of people specialising in designing the latest product to delight little ones enough to beg their parents to buy it as a Christmas gift. However, after about a week, these wonderful devices are left piled up in the toy box while the children go back to playing with things around the house they otherwise shouldn't.
I have an idea. Why not try and replicate the curious games kids invent for themselves. I guarantee it to be a money-spinner. Here's some that my 15 month old and my 4 year old will find enthralling:
Opening and closing cupboard doors.
Why not invent a life-size cupboard door that doesn't trap fingers and fits over your usual kitchen doors. Also works with washing machine doors, the toilet lid and drawers on rollers.
Stairmaster.
Real life stairs with Velcro and automatic air bag at the bottom of the stair case should they fall.
Pebble in the cup.
A non-toxic, anti-choke pebble and a normal cup. The objective is to fit the pebble in the cup, take it out then do it all over again.