It\'s the twins\' birthday and Al and his friends are experimenting to find out how to blast offhis time machine into outer space.
Trouble is, fiddling with balloons and homemade rocketsis very messy! When some extra baking powder accidentally spills onto the cake,it has some unexpected gassy consequences..
It\'s the twins\' birthday and Al and his friends are experimenting to find out how to blast offhis time machine into outer space