On Oct. 28, children's megastore Wonder! will open its doors in Deerfield, IL. A host of activities and offers will mark the grand opening of the 100,000-square-foot store. The first 100 customers at the ribbon cutting ceremony will receive gift cards ranging from $5 to $100. Children's band Ralph's World is also scheduled to perform and snacks will be provided at the Bean Sprouts Cafe. Festivities continue on Oct. 30 with face painting, balloon artists and Halloween activities.