Mixed paving materials - I like how this looks, plus it makes repurposing easier! CT - note: Could get some pavers that match front walk and combine with other materials to tie both looks together. Definitely want the walk to be permeable.
Use multiple frames and objects to create a larger shape like a square or rectangle. Maybe start with edges and fill in toward the middle. Incorporate the refillable frames into this gallery? In bolder colors than the other pin. entery or in living room