They work great with all Marble Genius rails and add-ons. We also have open tracks and, unlike some other reviewers, didn't have any problems with ball sticking. It would be nice if there were more colors.
𧩠Meland Learning Construction Blocks for Educational Building
9 Review
π Discover the Radiant Elegance of NATIONAL GEOGRAPHIC Glowing Marble Glow
9 Review
Advanced Structures For Babies & Toddlers Ages 10 Months And Up - WEofferwhatYOUwant Super Ball Drop With Double Bridge & Spacers!
37 Review
JOYIN Translucent Educational Construction Building Set for Learning & Education
9 Review
MINIBEAR Kids Digital Camera: 40MP, 2.4 Inch Screen, 32GB TF Card - Instant Prints & Selfies For Girls!
40 Review
CPSYUB Toddler Toys 18 Month Easter Eggs Gifts For 1-3 Year Old Girls/Boys Montessori Matching Educational Color & Shape Recognition Learning BPA Free (12 Eggs)
31 Review
School Bus Busy Board Activity Set For Early Learning And Fine Motor Development - 12 Basic Skills To Learn To Dress And Play, Ideal Sensory Toy For Preschool Kids, Kindergarten And Travel
31 Review
Educational Learning Games Buzzer With 5 Color Push Buttons - Great Tool For Activity Transitions And Game Show Zingers Attention Bell Answer Buzzers.
37 Review