[Tomte]

Buy Lego Minecraft. Lots and lots of 2x2, 2x4 and 2x8 bricks in sensible colors.

[thrower123]

Might have to look at this. The Classic boxes don't actually have the classic colors in much sufficiency, and are likewise full of tiny 1x1 and 1x2s to bulk up the part count

e.g. https://www.lego.com/en-us/product/creative-building-bricks-...

It's a less than useful selection of pastel colors to really do anything with.