This extra 10% discount applies to everything in the store, including sale items. For example, the R2-D2 App-Enabled Droid is currently on sale for $99.99 ($80 off the regular price of $179.99) and it comes with a free gift (Star Wars Force Band). Yet with this coupon code you get an extra 10% off ($9.99), making it just $90 + free shipping. The BB-8 and BB-9E app-enabled droids are also on sale.
To get your savings, click on over to the Sphero Store, add your items to the cart, and enter 10% Off Sphero Discount Code ROBOWEEK during checkout. Standard shipping is free in the U.S. on any order (no minimum purchase requirement.)