Kids have more access to technology than ever, but the Internet is still a dangerous place. No wonder so many manufacturers have built tablets specifically for the children's market. While many of these slates are Android-based, LeapFrog takes a different approach by using proprietary software designed to put age-appropriate apps front and center and keep kids away from unsafe content. The $149 LeapPad Ultra is the company's latest tyke tab, packing a colorful 7-inch screen and a custom browser for safe Web surfing. However, with a small starting app selection, is this kids' tablet worthy of your little one's attention?