try the silent minute... All children have to stand and close their eyes tight shut. start a stopwatch and say 'go'. children have to sit when they think a minute has gone by. If anyone sits exactly on 1.00 minute they win..you have the stopwatch to prove it. Another game to play is so simple but very hard... I still havent come across a group to succeed yet but all kid slove to try... they have to work in a group of 6 - 8 and count to 10 aloud.....randomly....anyone can shout out the next number but if anyone shouts out at the same time as someone else you start from zero again !!