My girl also didn't like to share before. But after joining playgroup & play with other BB, she's willing to share now.
Try to ask her to give the toys to you first. And then say "GOOD" and clap hands. Just show your BB that he/ she has done a great job by sharing. Then BB will be happy to do so.
thank you ~~~~~ my baby will join the playgroup at the end of may, i hope she can learn sharing with other child. And i will try my best to show 身教, thanks~