Any city that has a dragon bridge is a must see for toddlers with big imaginations. Toddlers will love taking a funicular up to the Ljublana Castle, where they may even get a chance to meet a dragon character who walks around the grounds and answers questions for kids. River tours through the town are popular with families, and Tivoli Park is a great place to run around and blow off steam. Plenty of water parks, complete with toddler-friendly attractions, dot the city as well.