<Play School Palette without Green>
1. Sunshine Yellow - 
                            
                            #FFD700
                         - A bright and cheerful yellow that evokes happiness and energy, perfect for creating a welcoming environment for children.
2. Sky Blue - 
                            
                            #87CEEB
                         - A soft and calming blue reminiscent of clear skies, promoting a sense of peace and tranquility.
3. Raspberry Red - 
                            
                            #FF007F
                         - A lively and playful red that stimulates excitement and draws attention, ideal for interactive learning spaces.
4. Orange Crush - 
                            
                            #FFA500
                         - A warm orange that combines the energy of red and the cheerfulness of yellow, fostering enthusiasm and friendliness.

This updated color palette maintains a focus on cheerful and energetic colors suitable for a play school, while removing the green hue. The remaining colors work together to create a vibrant and inviting atmosphere.

Would you like to add any new colors or perhaps explore different shades of the existing ones? What areas of the play school are you looking to design?