Even the regular co-sleepers get like this sometimes. Its quality time with mum and dad and they really don't like to waste it.

Lights out, lay them down, put the blanket over them and do as you do every time you put them to bed. If it takes putting them on their belly and patting their bum to get them back out like a light then thats the magic button.

Lights out is the most vital bit though. Then they cant see to play... or go for your eyes when they are closed!

I do recommend opening them when they do that and telling them no. Ignoring it doesn't work. Last time I tried I got smacked in the head with a plastic dinosaur.