My nieces came over for a visit last weekend. At first they were not so interested in playing with the rats. But then they noticed the adventure balls and pleaded that the rats should be in them. After a bit of negotiation (with the rats) we managed to get the two ratty girls going around the floor in their balls. I told my nieces that if they sat on the floor and called the rat by name while making a little kissy-noise the rats would come running to them. Everyone squealed with delight when the rats came rolling up to their knees.
The nieces took turns hand feeding the rats and the budgie, who had been closely watching the whole event.