We're arriving next week and were hoping to see what we missed last year - zoo, Volendam Hermitage, outdoor tulips at Keukenhof and in the fields, etc. Now we're searching for ideas for indoors. This year now looks worse than last and we can no longer do tons of stairs (not many elevators in the great historic locations), cold-cold weather, and too much walking without breaks and warm stops. Except Hermitage, big museums seem to still be closed and outdoor activities seem to be in doubt this year - again. Grateful for any ideas for indoor enjoyment.