Parents need to know that kids can access the site for free but are encouraged to upgrade to a "Primo" membership, which costs $5.97 a month or $57 a year. The Primo membership includes 50 minutes of free tutoring from an online homework help site. The membership also gives kids the chance to bid on prizes -- items like an iPod or puzzle books -- using the site's online currency, Tuki Moola, which you earn by playing games and participating in other site activities.
Educational value:Games focus on things like math and improving memory skills.