Unsourced material may be challenged and removed. Lego Duplo (trademarked as DUPLO and stylized in the logo as duplo) is a product range of the construction toy Lego by The LEGO Group, designed for children from ?1 1⁄2 to 5 years old.Click to see full answer. Then, is Duplo compatible with Lego??DUPLO® and LEGO® bricks are compatible, so you can use them together. There are some limitations, however. DUPLO® bricks fit best on larger LEGO® bricks and may come off easily from smaller LEGO® parts. LEGO® bricks will fit on DUPLO® parts as long as the DUPLO® ones have hollow studs on top.Secondly, can you buy Lego figures separately? Unfortunately, we can’t sell all our minifigures separately. Some of them, such as the figures from Star Wars™, NINJAGO®, NEXO KNIGHTS™ or THE LEGO® BATMAN MOVIE are “licensed”. That means we can’t sell them individually and they only come as part of a set. In respect to this, did Lego buy Duplo? 1 Answer. According to Wikipedia: In 1975, Duplo became its own product brand, with five sets made up exclusively of Duplo bricks. In 1977, the Duplo name was dropped in favor of Lego Preschool.Where can I find Lego part numbers?Look for a 4 or 5 digit part ID on the element. These are usually printed on the inside. A magnifying glass and good lighting can be helpful. Many bricks will also have other numbers printed on them, but only the 4 or 5 digit numbers are useful for identifying parts.