The first "Bloons" game was made by Stephen and Chris Harris, who are two brothers from New Zealand. Before working on "Bloons", the brothers had released "Cash Sprint", which was a racing game. After "Cash Sprint" proved to be successful, the brothers made their own website for flash games. However, the site wasn’t successful. The brothers decided to focus on making their own games, and made a website called Ninja Kiwi, which had five games when it opened. The site was a success, and this led to the brothers’ work on "Bloons".