This was my childhood.
my brother had a DSi when we were younger, and I'd always steal it. One of the games we had on it was Let's Draw! which I was so f-king obsessed with. I'd play it all the time. On long car journeys, in the waiting room etc. I'd also play Nintendo Dogs but I was more obsessed with this game. It was repetitive, but I'd play it over and over again for hours and I'd never get bored of it. I loved it so much.
Sadly, I've lost the cartridge for it to space and time. It's somewhere in my house. I may buy another one and play it on my 2DS XL, to relive those moments. I swear- I remember that game vividly.