These letter blocks are great for kids. You can get creative and print the letters in any color. For the base color, I recommend a cream color. The pictures don't do it justice. It came out really nice and the letter colors complement it nicely.

To get the letter colors to be different, I did a pause in the slicer and a manual filament swap. I printed 3 sets with different colors. I'm actively printing more so there's more variation. I'd love to see what fun colors you make so if you print them, please tag me! 

The kids love playing with them.

If you want the filament colors I used, here are the links:
Base color (Tan PLA): https://amzn.to/4d47JXP 

Blue Color: https://amzn.to/4d3rMFX

Red Color: https://amzn.to/4lYhf37

Green color: https://amzn.to/4mkJJEr

Note: These links are affiliate -and it won't cost you extra to use them. They just support me by giving me a very, very, very, small commission if you buy using these links. But you don't have to ;)