Boston Children's Museum worth a weekend trip

Tufts University has concerts, sports, theater, and its own coffee shop. That certainly seems like plenty to do on campus. However, why is there no Sesame Street, climbing-gym playground, giant mechanical lobster, or model of a typical 1950s house? Since Tufts seems to have no immediate plans to build such an entertainment center, you can only go to the Boston Children's Museum to satisfy this craving. For those willing to forget their prejudices against the place and just play for a few hours, there's a lot to do.