In φ⁴ theory the potential V(φ)=¼(1−φ²)² supports topological kink solutions φ_K(x)=tanh((x−x₀)/√2). A kink-antikink pair collides: at low velocities they form a bound state (bion), at higher velocities they scatter through. The field energy density ε=½(∂_t φ)²+½(∂_x φ)²+V(φ) shows localized lumps.