I know what I would do!! LOL! Since I act like a 4 year old already anyway emotionally and socially because of my Autism.
If I got turned overnight into a 3 year old, by Santa or God or whatever, I would wake up in total shock, like what happened to me. Then I would hysterically laugh in glee and joy like a 3 year old and rush tearing down the hallway hearing my tiny feet patter to my parents bedroom (I still live with my parents), and greet them with a high pitched toddler voice, and jump into their bed and snuggle with them! I'm sure they'd be happy to see me as a 3 year old again!
Then in a short while, I'd run back to my bedroom and go through a my tote bins and find the most cutest and adorable long-alls and jon jons that I could fit into and find the sweetest and adorable T strap Mary Jane shoes to wear! And play some oldies music on my Fisher Price Big Bird record player that I have. I have quite a bit of 45 rpm records and love oldies and soft rock songs. And I have liked that genre of music as far back as I remember, back to nursery school literally. I suppose my sensitive toddler / preschooler ears would make my listening experience even more enjoyable as my auditory acuity would be even better and sharper. I was an assistant co-host at Preschooler Storytime, along with my now retired elderly children's librarian friend, for 3 to 5 year olds at one of my local libraries, for 16 years until COVID 19 destroyed everything. So I've had lots of experience around young children and believe me when I say that they love oldies music. We even had sock hops during holidays for the Preschoolers at the library and I provided the music basically more or less as a DJ. Of course they also like children's songs, but I'm familiar with all that too.
I probably would, after a while, run to the bathroom, and look in the mirror and think to myself : "Who's that cutie pie 3 year old in the mirror?"
I'd probably then get my dad (or maybe mom even) to take me to the local amusement park and other amusement parks within 2 hours distance. I'd probably wear a longall, peter pan collar shirt, and T strap Mary Jane buckle leather shoes to the amusement park. And then my joy and fun at the amusement park would be likely quadrupled, as I would then be able to ride on many more kiddie rides, because I would then be under the maximum height restrictions for those rides (usually 54 to 57 inches tall in most amusement parks). I would have a real blast riding all the kiddie rides. A lot of fun. There's not many places I can ride on kiddie rides, but if I was a preschooler or toddler, my options for rides would be much more. I never forget about the aerial carousels - meaning the rides that go around in a circle that have a lever to pull up and down. Think of like Dumbo The Flying Elephant at Disneyland or Disney World. Or like the Red Baron Airplane rides you find at generic local amusement parks or at county fairs. I love for those types of rides.
I would also definitely get some Spanish children's shoe companies to make me T strap shoes. Actually I wouldn't even have to do that, because they would likely already have some ready made ones in my shoe size (which would obviously be the size of a toddler).
I'd definitely get some kiddie ride on cars too. And some Power Wheels cars as well. More in next comment.
- longallsboy