Teddy Bear Hunt
Hide a small teddy bear in one of your party rooms, or in a section of the garden. Make sure the kids know what they are looking for. You can use any small toy if you don't have a bear.
Then have your little guests come into the room and search for the teddy. As they get closer call out "Warmer, warmer" until you get to "Hot!". As they get further away you call out "Cooler, cooler" until you get to "Cold".
The first person to find the bear then gets to go and hide it for the next round.