how to amuse four children

we’re looking after our friends’ children this weekend so they can go off and have a nice quiet weekend. so the question is, how do you amuse 4 children for 2 days ?
i hadn’t got a clue, but luckily jane had. she suggested they all drew on a long piece of paper. which they all did, happily, for ages:
when it was my turn to suggest a plan i chose the telly. this too proved popular (as can be seen here):