With our little personal trainer around, you'll always be watching your weight. GIANTmicrobes(R) Original (5-7" plush doll) $9.50 GIANTmicrobes(R) Petri Dish (3 mini microbes) $14.50

Brain Cell (Neuron) Egg Cell (Human ovum) Fat Cell (Adipocyte) Nerve Cell (Neuron) Platelet (Thrombocyte) Red Blood Cell (Erythrocyte) Sperm Cell (Spermatozoon) Stem Cell (Hematopoietic stem cell) White Blood Cell (Leukocyte)