The Melissa & Doug Deluxe Jumbo Cardboard Blocks set contains 40 blocks in three sizes, constructed from durable, extra-thick red cardboard that supports up to 150 pounds. The blocks feature bright, colorful graphics to encourage creative play while remaining lightweight and easy for children to stack. Assembly is straightforward with included step-by-step instructions for fold-together construction. The wipe-clean surface allows for easy maintenance, and the product ships in specialized e-commerce packaging designed to minimize waste. Recommended for children ages 2 to 5, these blocks pair well with Melissa & Doug Standard Unit Blocks for extended building play. The brand has been recognized for over 30 years for its focus on imaginative, screen-free play experiences.