A freezer is the most secure place for candies, especially if you hide them in a pack of frozen vegetables.
A stability ball will develop correct posture and help restless children concentrate during classes.
Cut-outs in a ball allow babies to hold their bottle themselves.
Lego is an easy way to explain fractions.
And for those who are too young to learn fractions, there are zip bags filled with paint. An easy way to create and stay clean.