PSA: The Aldi near me had these foam play mats today, 4 for $12.99. They don't have grid lines like other blocking mats, but they're about 4x the size. Well worth it,
8~32Pcs Eva Interlocking Fitness Mat, Sponge Non-Slip Mat, Children's Non-Slip Floor Mat, Suitable for Home Fitness Exercises
Norsk Red 24 in. x 24 in. x 0.47 in. Foam Interlocking Floor Mat (6-Pack) 240647 - The Home Depot
Crivit Floor Interlocking Protection Mat 8 Piece Set Surface Protection | Underlay Mat For Home Sports Pool Gym Fitness Basement Garage : Amazon.co.uk: Sports & Outdoors
3 Sprouts Modular Toy Mat - Hazelnut - 100% Eva Foam - 63x63x8cm - 6Pieces and 10Borders unisex (bambini)
The Best New Aldi Home Products Arriving in Stores This February