For kids glasses, I have found that these work great:http://cgi.ebay.com/3DTV-GLASSES-KIT...item230d8f0aaf
They are 3DTV corp's Model U glasses with Universal IR emitter. On my set the PQ isn't the best with em, but they are fine for kids. They are tighter then the UC glasses, rechargeable, and the arms are thicker so they don't have as much "give" to them. My 6 and 4 year olds wear them with no problem. Check the sellers store on ebay as they also have this kit with 2 and 4 pairs of glasses.
The IR emitter is very strong and knocks out my remotes, so I made a tinfoil cover for it when I need to use the remote. The emitter has many modes and a sync reverse switch making it perfect for people that want to mix DLP Link and IR glasses. The glasses also have a switch to reverse the sync.
They also sell these glasses alone, but I am not sure if they'll work with the Sammy/Mitts emitter:http://cgi.ebay.com/3DTV-Glasses-Nvi...item256068541c
The seller responds to emails if you have any questions.