IKEA DUKTIG it is a simple toy for our children, it only has a dummy induction hob that can be turned on electronically, to give the feeling of a real kitchen.
One day my daughter, seeing me use the "real" microwave in the kitchen, said to me: "Daddy, my microwave oven doesn't have the numbers!", I immediately replied that I would build the "numbers" for his oven.
In this photo you can see the final result:
Instead here is a video showing how it works:
As you can see, there is a lot of free space in the front panel, in the final analysis I chose this solution that closes everything, in the future I could use that space to add other features.
Head over to Bill of Material for a list of components you need to purchase to build the Timer.
You can program the Arduino Mini Pro before assembling the Timer. This page show how to program it, and here an explain of code.
Follow the istruction in the page to assemble the Timer in the kitchen.