The Giant Amoeba is a minor alter ego of Calvin's. It appeared in a single weekday strip. In it, Calvin hid under a sheet or blanket, crept along the kitchen and reached out to grab a package of oatmeal cookies (with the amoeba's "cytoplasmic pseudopod". After eating for a short while, he was discovered by his mother. It may be similar to Amobea Man from Garfield.