SpongeBob will be the envy of Mussel Beach when he buffs up at the Wacky Gym by Mega Bloks SpongeBob Square Pants. SpongeBob has always wanted to be Bikini Bottom's strongest sponge and now he can! Build the gym's weight set and help SpongeBob Square Pants become Muscle Bob Buff Pants when you push down on the bench to make him lift the teddy bear weights. Ideal for ages 5 and up!