We explain how the collision of two bubbles filled with anti de Sitter space and expanding within a five-dimensional de Sitter or Minkowski space can lead to the creation of a (3+1) dimensional braneworld universe. The causal future experienced by the inhabitants of this brane is virtually identical to the Randall-Sundrum spacetime. Their past, however is markedly different. We present a calculation of the scalar perturbations predicted in the colliding bubble braneworld scenario. We also discuss the effects of gravitation in the collision of the two bubbles within the thin wall approximation and present the first attempts towards the numerical simulation of the collision within a toy model based on a scalar field coupled to gravity.