This is a fun thread! My bikes, with years and a one-line blurb with what my memory comes up with at first impulse.

nr.1:
Wooden Draisienne. To get a sense of balance, they tell the parents. Don't bump into the coffee table all the time, the parents tell the kids.

nr.2:
A 16" wheeled bike full of Teenage Mutant Ninja Turtle stickers. Coolest bike in the world ever. I guess this is the moment the first needle went in.

nr. 3:
A red (you know, cuz it's faster!) Batavier, the junior brand of Batavus. Even cooler, this one had fenders and reflectors! rocket tech for 7 year old me.

nr.4: a "All Terrain Bike 24", 24" single speed mountain bike. Dad took me on a tour. 15 km to the campsite, it felt like Columbus 1492. Now that ride is the first breezy part of my regular training route. Time flies, now does it? Never got cured of my liking for bombing on unpaved roads, nor the single speed bug.

nr. 5: A "Piet Pelle" Gazelle. Child-sized 3 speed. I think I started a "Rosebud" thread on that a while ago. Every inch a gentlemen's bike, except in a smaller size, like one of those kid waistcoat-and-tie getups your mom made you wear at weddings.

Got a little too tall for all of those. Still, the happy memories remain.