Hexy is the first educational robot from ArcBotics, a Somerville, Massachusetts, robotics company.

WIRED Design's Joseph Flaherty just wrote about Hexy, one of the very few successful Kickstarter projects to be made on time. 

Hexy creator Joe Schlesinger says he relied on a technique called “design for manufacturing” to make sure his robot was ready to ship on schedule. “Most people design a cool product and then try to figure out how to make a thousand of them,” Schlesinger says. “I looked for parts that I could get by the thousand and built a product around them.”

But it doesn't look like most entrepreneurs on Kickstarter understand that principle. Delays are increasingly common on the most successful Kickstarter campaigns, which is quite frustrating when you've pledged money for a new product you're excited about and have waited months and months past the expected delivery date to receive.

Have you backed any projects that were successfully funded but took forever to send the goods? Share your experiences with the community!