Create a pattern or sequence by combining a straight piece with a curved piece again and again until you make a square. The 80-piece ECR4Kids Totally Tubular Pipes and Spouts Set includes pipes that are straight and round with two, three or four ends. Design pipelines or 3-D animals in a mix of blue, green, yellow and red. To clean, wash pieces in the sink with a clean sponge or rage, soap and warm water.