Work straight out of the Box, You wind up the little old dears with the turner on the side. The same as on the chattering teeth you would buy from the joke shop.
Once wound up, you place down on the table and let go, and away they go at a snail pace, as grannies do. The granny to get to the end of your course ( End of the table) wins.
My grannies fell over a lot!!! Or they wouldn't walk forward, if this happens all you have to do is adjust you zimmer frame, as the position of this also effects the speed you granny will go.
Bought mine at christmas for a Secret Santa Present, so at £5.00 they were ideal, and they were in my opinion the best present on the night, everyone joined in to have a race. Unfortunatly after that they just stayed in the box, so they are a use once type of present.
Quiet Fun, Cheap, But im glad i bought them as a present and didn't have to keep them.