Thermitts — Kes Gray

Nelly is as busy as ever monster-sitting strange and unusual monster babies. With inviting Huffaluks to her birthday barbeque, struggling to frighten Muggots to sleep and stopping Thermitts from melting, Nelly's monster-sitting adventures continue to be full of surprises!

It has to be zero degrees or below for the thermits or they'll melt, so monster sitting during a heat wave is going to be a challenge for Nelly...