We just got back from Vero 2 weeks ago.
Many of the activities are free. Sporting events, games, bubbles, various contests, beach walk, unbirthday party, campfire, were all free.
Examples of activities that had a fee involved are:
Cell Painting ($10) - and totally worth it - my nephews painted a Mickey and Minnie animation cell and that goes on top of a background scene that can be framed. It was very cool - I wish I had done it with them.
The fish T-shirt thing described above - the kids get to paint their own shirt - you pay a small fee for the shirt.
Manatee Adventure, Kayak Tour, WaveRunner Tour - these were all around $25-$35 per person but lasted several hours and sometimes included lunch.
You can rent movies for free, play mini-golf for $1 and also rent bikes, boogie boards, etc. for a small fee.
My nephews did a ton of stuff and only paid for 1 or 2 activities.
Jenn