You've come to our website, which offers answers for the Brain Test 4 game. This webpage with Brain Test 4 Doctor Worry needs a butterfly for his next experiment answers is the only source you need to quickly skip the challenging level. This game is made by developer Unico Studio, who except Brain Test 4 has also other wonderful and puzzling games.
Feed the caterpillar. You can advance time by dragging the sun and the moon down. The caterpillar needs 5 leaves. The cocoon needs 3 days to hatch out.