Easy "Flea Circus" Achievement
Start level 6 and position two steel bands to create an angle just under the cannon. Then, select the cannon repeatedly. The Trixes will disappear shortly after they have stopped moving.
Easy "Impressive Lifespan" Achievement
Start level 11 and position two elastic bands to form a cross in the middle. Select the cannon once and the Trix should bounce around before moving backwards and forwards until sixty seconds pass. Note: This may require several attempts.