what about this?

import streamlit as st

# Create a button that shows a number slider when pressed
if 'show_slider' not in st.session_state:
    st.session_state.show_slider = False

if st.button('Press it Now!'):
    st.session_state.show_slider = True

if st.session_state.show_slider:
    # Display a number slider when the button is pressed
    th = st.slider('Please enter the values from 0 - 10', 0, 10, 0)
    st.write('Slider value:', th)