Three is really young to even think STEM. That does not mean you can’t go there, but one-on-one involvement on your part is absolutely essential. When my kids

Three is really young to even think STEM. That does not mean you can’t go there, but one-on-one involvement on your part is absolutely essential. When my kids were that age, frankly, it was more about mommy than me. Still, we built an awesome wooden train table (Thomas trains, tracks, etc.). I also gave them an old IBM keyboard, the kind with the keys that click. They loved sitting on the floor next to me while I was on the computer. I also got them involved with any project I did in the shop (so long as it wasn’t dangerous). For example, I’d have them help build model airplanes (hand me tools, parts, hold things, etc.). I also took them to the flying field and had them fly with me using a “buddy box” (two transmitters linked for teacher-student control of the same plane). And fishing, even if it is using a lure without real hooks that looks like a little fish (after I clipped off the hooks). Definitely fishing, nothing compares to quality time fishing on a kayak on the lake. The common thread is 100% personal involvement. That’s the only way it works, even if all you have are cardboard boxes (which should not be underestimated, BTW).