That makes no sense at all. If you're in diapers now, you would be a 2010s kid.
Your surmisation is also incorrect. Wearing diapers could indicate one of two variables; (1) You are under the accepted age of 4 years and not yet potty trained, making you a 2010's toddler. (2) You are elderly and or handicapped and must facilitate the use of diapers, making you (Decade of Birth) kid.
To VKimo: I realise that adults sometimes wear diapers too, but it is far more common for infants to wear diapers, so I think my point still stands. An infant/toddler in diapers now would be born no later than this year (2012), so they would be 2010s kids. Yes they would also be early 2010s babies/toddlers, but mainly 2010s kids. You can't really call someone born in 2008-2012 a 2020s kid, thats ridiculous.