  We study a picture of effective interactions among the $W$ and Higgs bosons
which is consistent with the precision tests at present energies, and at the
same time allows for large observable New Physics (NP) effects in the bosonic
sector. Toy dynamical models containing new heavy particles are used to
indicate how such a picture could be created by integrating out the heavy
particles. In these models custodial $SU(2)_c$ symmetry is realized at a
certain large scale $\Lambda_{NP}$, either naturally or at a certain limit of a
single coupling. In the derivation of the effective lagrangian we keep
operators of dimension up to six. These operators involve only the known gauge
boson and Higgs particles. They provide a valid description of NP up to an
energy scale which is just below the mass of the new heavy degrees of freedom.
