When giftedness shows up in toddlerhood... I think sometimes it's almost easier to NOT have other kids around of the same age to compare too.... cause then you're not reminded all the time that somethings different and you just to what fits. You go with the flow.... you follow their lead. That's what got me through our first 2 1/2 years pretty well... It only got tricky when DD really wanted pre-school and everyone said she was too young. We found a great place that accepts her for her though and took her into an older class early. She loves accademics so this is great.
As for giftedness in enginering and math pre-school may or may not be a good fit but the key is being repeated... just follow their lead and stimulate as much as you can without overwhelming. It can be a fine line I guess but just watch his signals and let him explore!
Look at me! The Newby sounding like a pro like you guys! ha ha ha it's just cause I'm repeating what I was told a few months ago when I came on here going "Is my reading 2 year old normal?" lol...
Just remember... if you care enough to come on here and get advice and resources... than you obviously care enough to give him your best and let him become who he was meant to be and it'll turn out just fine.
This has been a great place for support! So keep it up!