Kapu Bloom Tunes ($1.99) lets your kid paint the world with melodies! Kapu Bloom Tunes combines two creative pastimes, creating music and painting, and also teaches the basics of how melodies and tunes are crafted in a fun way.
The app is designed to be usable by the youngest users (birth to age three), although my daughters (age seven and five) enjoyed experimenting with it too. The interface is easy - there's no way to do anything wrong, and everything is based on just trying things. The biggest plus - Kapu Toys apps are free from in-app purchases and ads, so you know your kids are in an environment where there's no additional costs or ads.
About Kapu Toys:
Kapu Toys is the digital toy box filled with smiles! They believe in fun play and clever apps that spark the imagination, inspire families to play together and let kids learn along the way! Inspired by vintage aesthetics, they create digital toys for the tiny ones. Visit facebook.com/kaputoys or youtube.com/kaputoys to learn more.