My daughter is 5 and has dozens of the ponies. Today we picked up a Wave 7 blind bag which was Cherry Pie (90276). She's interesting as her body is a bit translucent but her hair and tail are opaque.
I finally found a site which tells you which bags have which ponies, so I'm going to try to go back to Toys R Us tomorrow and see if I can find Fluttershy for my daughter. She loves her the best. For her birthday we got her the 20 inch plush Fluttershy and had to buy it online as I couldn't find it here in Canada.
Before that a couple of days ago I bought her Applejack because she had a figure from her birthday cake but its hair was molded (what my daughter calls "statue hair") so she really wanted Applejack with "real" hair.
The blind bags are sooo expensive here
For my daughter's birthday party I picked up 12 of them at Wal Mart and they were about $4 each (one for each invited child with a few to spare
Luckily I did find My Little Pony coloring books at Michael's for only $1 each (got ten of those!)
I have a hard time saying no.
Edited to add that today hubby and I went to 2 Wal Mart's and a Toys R Us and picked up Wave 7 Fluttershy, Soarin, Spitfire, Rainbow Dash, Sweetie Drops, and Wave 6 Twilight Sparkle and Rarity