Supervise your child the first couple times to make sure you feel comfortable allowing her to use the toaster on her own, and be sure to teach her proper toaster safety, such as never sticking a utensil inside it and allowing the food to cool for a minute or so before removing it. Also, only allow her to use a dull butter knife for spreading toppings and cutting up bananas, and make sure she is well-versed on knife safety.
Always discuss microwave safety before allowing your child to use it on his own — use this printable microwave safety sheet for kids to make sure you cover everything.
If you have time for a little make-ahead prep, baked oatmeal squares are a great substitute for instant oatmeal and are perfect for mornings your child may need to eat his breakfast on the run. Make and cut a batch using your own healthy recipe, or try this one, and store in an air-tight container for easy grabbing.