Amazon has a deal for Buy 2 Get 1 Free on select Melissa & Doug activity books and pads. Their prices start as low as $4 plus your order ships for free wit a Super Saver order of $35 or more OR Free 2-day shipping with Amazon Prime membership.
Note: There are some items that are “Add-on Items” that will only ship when you have a qualifying order of $25 or more. When you include Add-on Items with Amazon Prime orders of $25 or more, you’ll also receive Prime shipping benefits, including Free Two-Day shipping. Add-on Items are also eligible for Free Shipping in qualifying orders of $35 or more.