50 Cent: Family Wants $10k Autism Bullying

The family of the autistic teen 50 Cent bullied still wants the rapper to open up his wallet, but this time it's for a good cause and far less cash ... the family's attorney tells TMZ.

Attorney Matthew J. Hammer says Andrew Farrell and his family want 50 to cough up $10k for Autism Speaks, an autism advocacy group.

The donation is far less than the $1 million Andrew's stepdad was first eyeing.

We're told Andrew and his family received 50's signed, albeit short apology Tuesday via an email after news broke of Andrew's disabilities and were happy he said sorry.

As we reported, 50 got in Andrew's face at an airport accusing him of working while on drugs, when in fact he's autistic and is also afflicted by Asperger's.

50 has yet to answer back about the $10k donation.