These items are Telescopic Suction Cup Robot Toys, often used as stress relief or educational fidget toys. 
Features: They have stretchable "pop tube" limbs that can bend and twist into various shapes. 
Design: Each limb features a sturdy suction cup on the foot or hand, allowing them to stick to smooth surfaces. 
Functionality: They are designed for shape-shifting and can improve hand strength and attention span in kids. 
Options: They often come in packs of four with different coloured robots (red, purple, blue, yellow).