This set is the perfect Lego Batman set after your little ones outgrow Duplo Batman. I give this lego juniors set five stars because it is fun for my five-year-old to build, plus it is large and complex enough for him and his three-year-old sibling to play with simultaneously after it is built. With three minifigures, two computers, a map, a phone, a jail, a batmobile and a gate to crash through, and a Joker's hammer and catapult, the two of them can play together with little argument over who gets what. The set retails at about $30 for the 150 pieces, which seems too expensive, but actually it is worth it. If you are wondering what makes a lego set "juniors", compare this 150-piece set for $30 with the 134-piece Lego Batman Penguin face-off set for $11. You might be tempted to get the cheaper Lego batman set, but although they have a similar piece count, the lego juniors set has much bigger pieces (still fully compatible with all other lego pieces) so the final build is much larger. For comparison, our penguin face-off set fits in a plastic sandwich Baggie while the lego juniors batcave needs a gallon size bag. (I do recommend the penguin face-off set as well!) Also, to the person asking if these lego pieces are compatible with duplo, yes! The bigger ones are! The bigger Lego pieces (like the chunky bricks) click right on to duplo blocks.