I'm now 34 and will be 35 years old next year and I have loved wearing diapers ever since I was around 5 years old.
However it was not until around age 8 and 10 that I could wear diapers more in secret.
By age 8 I would go to the store and buy some of those plastic backed pampers diapers and wear them in secret at home.
I would go down to our basement and wear the diapers or go up into our attic sometimes as well.
Other times I would be in my bedroom and block the door and wear the diapers in secret although there were a few times I were caught wearing the diapers.
I used to hate myself for wanting to wear diapers and thought I was the only kid who wanted to wear diapers and tried to quit wearing them.
But later on I came to accept myself and now enjoy diapers even more without shame.
I prefer wearing diapers instead of boxers or underwear as diapers to me are more comfortable.
I wear mostly adult sized adult diapers but sometimes I will modify a toddler diaper such as Gentle Steps size 7 diapers, Pampers Cruisers size 7 diapers, Luvs size 7 diapers etc to feel more like a toddler.
Even though the size 7 diapers don't fit properly they still are fun to wear.
Right now I'm wearing a Gentle steps size 7 diaper that I modified by using a hot glue gun to glue the Velcro Strips to the side of the diaper so the tabs would reach.
Then I put some tape around it to hold it on.
The Gentle Steps size 7 diapers are very absorbent and swell up nicely and you can get them at Dollar General pretty cheap.
I also remove the cloth backing by peeling it off which makes it feel much better.
There's also a user named pamperslover on here that is around my age that wears diapers 24/7 and even his nephew is a diaper lover and I think his nephew is around 8 or 9 years old.