In Round by 1,000 Hints, it would not accept “10,000” as the answer when it was the correct one and we typed the right amount of zeros. Also, I wish the entirety of the 10,000 would be visible instead of the entry appearing and being limited as “10,00...” Another suggestion is to make it fun rounds for kids so that a succession of correct answers or high accuracy rate leads to something fun visually or maybe a points system that elevates levels, etc. The rollercoaster halves whisking away gets a little boring. All that said, the app does help instill this math skill.