Numerical simulations and recent experiments on dynamo reveal interesting properties of dynamo transition. In this article we have highlighted some of the results of the VonKarman sodium (VKS) experiment and the Taylor-Green (TG) dynamo. In the VKS experiment the dynamo transition is through a supercritical pitchfork bifurcation after which a variety of dynamo states with constant, time-periodic, quasiperiodic, and chaotic magnetic fields are observed. Recently Yadav et al. [10, 13] have performed numerical simulations for PM = 1 and 0.5 with TG forcing and analyzed the low wavenumber Fourier modes to infer the dynamo states. The dynamo transition in the simulation was supercritical and subcritical for PM = 1 and PM = 0.5 respectively. Yadav et al. [10, 13]