There is a beehive hanging on the branch of the treehouse.You can reach it through the window.
I am not touching it!
And the gas?
It is in
Bees are usually tamed with spraying gas on them.
There's bellows in the class room chalkboard.
Take some of the dry ice gas into the bellows.
Climb to the window and spray it to the beehive to make it drop.